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Are there any dimmable LED strips that operate by fully illuminating X% of the LEDs? As opposed to time-slicing all the LEDs. I don’t know enough about hardware to know if that would be feasible.

The flickering and whining is pretty bad in all the dimmable LED bulbs I’ve used (but I haven’t yet looked hard for high-end ones).

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That severly shortens the lifetime of an LED, like by a factor of 10. So I would guess it is not common because much of the benefit that gets marketed is the longer lifetime. It is possible to build a better dimmer switch which actually works across the full profile of voltage variation but the problem then is you have to pay an engineer money and why do that when you can spend money on booze and dinners to win more sales contracts with your lighting distributors and get a higher ROI? The lighting world is a very consolidated place.

Yea, my desk lamp does that.

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